Sediment load trends in the Magdalena River basin (1980–2010): Anthropogenic and climate-induced causes

Restrepo, Juan D.; Escobar, Heber A.

doi:10.1016/j.geomorph.2016.12.013

Cited by 44 publications

(37 citation statements)

References 68 publications

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“…Their findings also suggest that this system is not affected by this phenomenon's signal, as the correlation values between these parameters and ENSO is approximately zero. It is worth mentioning that this is different from the behavior of some Colombian rivers discharging in the Caribbean sea, as the latter exhibit a significant relationship with strong ENSO events and Pacific Decadal Oscillation [25][26][27].…”

Section: Analysis Of Trends Based On Their Spatial Distributionmentioning

confidence: 67%

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Analysis of Streamflow Variability and Trends in the Meta River, Colombia

Arrieta-Castro

Donado-Rodríguez

Acuña

et al. 2020

Water

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The aim of this research is the detection and analysis of existing trends in the Meta River, Colombia, based on the streamflow records from seven gauging stations in its main course, for the period between June 1983 to July 2019. The Meta River is one of the principal branches of the Orinoco River, and it has a high environmental and economic value for this South American country. The methods employed for the trend detection and quantification were the Mann–Kendall (MK) test, the modified MK (MMK) test, and the Sen’s slope (SS) estimator. Statistically significant trends (at a 95% level of confidence) were detected in more than 30% of the 105 evaluated datasets. The results from the MK test indicate the presence of statistically significant downward trends in the upstream stations and upward trends in the downstream stations, with the latter presenting steep positive slopes. The findings of this study are valuable assets for water resources management and sustainable planning in the Meta River Basin.

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Section: Analysis Of Trends Based On Their Spatial Distributionmentioning

confidence: 67%

“…Restrepo and Escobar [27] examined the presence of trends in suspended sediment load (SSL) time-series in the Magdalena River basin. Their findings indicate that increasing trends in sediment loads correlate with the increases in forest clearance and land cover changes.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Streamflow Variability and Trends in the Meta River, Colombia

Arrieta-Castro

Donado-Rodríguez

Acuña

et al. 2020

Water

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“…Downstream of the convergence of the Magdalena and Cauca Rivers, the main channel flows through an extensive floodplain (22,000 km 2 ), the Momposina depression, and into the Caribbean Sea at Barranquilla. The Magdalena–Cauca has one of the highest sediment yields of the large South American rivers, transporting 184 Mt of sediment to the ocean annually (Restrepo & Escobar, 2018). The Magdalena–Cauca River basin contains 80% of Colombia's human population, and there are a number of anthropogenic activities influencing its conservation, including hydropower development, deforestation, urbanization, mining, and livestock and agricultural development (Galvis & Mojica, 2007; Jiménez-Segura et al, 2016).…”

Section: Potential Ecological Effects On the Magdalena River Basinmentioning

confidence: 99%

Potential ecological and socio-economic effects of a novel megaherbivore introduction: the hippopotamus in Colombia

Subalusky

Anderson

Jiménez

et al. 2019

Oryx

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Introduced species can have strong ecological, social and economic effects on their non-native environment. Introductions of megafaunal species are rare and may contribute to rewilding efforts, but they may also have pronounced socio-ecological effects because of their scale of influence. A recent introduction of the hippopotamus Hippopotamus amphibius into Colombia is a novel introduction of a megaherbivore onto a new continent, and raises questions about the future dynamics of the socio-ecological system into which it has been introduced. Here we synthesize current knowledge about the Colombian hippopotamus population, review the literature on the species to predict potential ecological and socio-economic effects of this introduction, and make recommendations for future study. Hippopotamuses can have high population growth rates (7–11%) and, on the current trajectory, we predict there could be 400–800 individuals in Colombia by 2050. The hippopotamus is an ecosystem engineer that can have profound effects on terrestrial and aquatic environments and could therefore affect the native biodiversity of the Magdalena River basin. Hippopotamuses are also aggressive and may pose a threat to the many inhabitants of the region who rely upon the Magdalena River for their livelihoods, although the species could provide economic benefits through tourism. Further research is needed to quantify the current and future size and distribution of this hippopotamus population and to predict the likely ecological, social and economic effects. This knowledge must be balanced with consideration of social and cultural concerns to develop appropriate management strategies for this novel introduction.

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“…Este aumento en la carga de sólidos cobra gran relevancia en lo concerniente a la calidad del recurso hídrico y el ordenamiento de las cuencas hidrográficas, ya que tiene una relación directa con la producción de sedimentos y la contaminación de las aguas superficiales y subterráneas. En diversos estudios se ha demostrado que el deterioro ambiental de varias cuencas a nivel nacional se ha asocia con la carga de sedimentos (Restrepo, et al, 2015;Restrepo & Escobar, 2016).…”

Section: Discussionunclassified

Variación espacial y temporal de nutrientes y total de sólidos en suspensión en la cuenca de un río de alta montaña tropical

Hoyos

Suárez-Segura

Villabona-González

2018

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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Los sistemas de aguas dulces son sensibles a modificaciones antrópicas. Las actividades diarias allí en donde el agua es un recurso imprescindible para la industria y el ámbito doméstico aceleran el proceso natural de eutrofización en los ecosistemas acuáticos con el consecuente deterioro de su calidad. Con la finalidad de entender los cambios en el tiempo y el espacio de las concentraciones de nutrientes (nitrógeno y fósforo) y del total de sólidos en suspensión (TSS) en el río Negro, se recolectó la información en los tramos alto, medio y bajo de la cuenca en las épocas de sequía, durante la transición de la época de lluvias a la sequía y en la época de lluvias desde el 2010 hasta el 2014. Se encontró que las quebradas La Pereira, La Cimarrona y La Marinilla, afluentes del río Negro, son focos de interés ambiental, dado que presentaron mayores concentraciones de nutrientes y de sólidos en suspensión que afectan de manera notoria las aguas del río, en especial en el tramo conocido como Puente Autopista-RN5, donde estas convergen. Además, se evidenció que los fenómenos de variabilidad climática, como el sistema de El Niño-Oscilación del Sur (ENOS) en su fase invernal (La Niña), incrementan notablemente las concentraciones de sólidos en suspensión y que los periodos de sequía favorecen el aumento en las concentraciones de nutrientes. © 2018. Acad. Colomb. Cienc. Ex. Fis. Nat.

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Sediment load trends in the Magdalena River basin (1980–2010): Anthropogenic and climate-induced causes

Cited by 44 publications

References 68 publications

Analysis of Streamflow Variability and Trends in the Meta River, Colombia

Analysis of Streamflow Variability and Trends in the Meta River, Colombia

Potential ecological and socio-economic effects of a novel megaherbivore introduction: the hippopotamus in Colombia

Variación espacial y temporal de nutrientes y total de sólidos en suspensión en la cuenca de un río de alta montaña tropical

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